|
<!DOCTYPE html> |
|
<meta charset="utf-8"> |
|
<style> |
|
|
|
svg { |
|
font: 10px sans-serif; |
|
} |
|
|
|
.area { |
|
fill: steelblue; |
|
} |
|
|
|
.axis path, |
|
.axis line { |
|
fill: none; |
|
stroke: #000; |
|
shape-rendering: crispEdges; |
|
} |
|
|
|
.brush .extent { |
|
stroke: #fff; |
|
fill-opacity: .125; |
|
shape-rendering: crispEdges; |
|
} |
|
|
|
</style> |
|
<body> |
|
<script src="http://d3js.org/d3.v3.min.js"></script> |
|
<script> |
|
|
|
var margin = {top: 10, right: 10, bottom: 100, left: 40}, |
|
margin2 = {top: 430, right: 10, bottom: 20, left: 40}, |
|
width = 960 - margin.left - margin.right, |
|
height = 500 - margin.top - margin.bottom, |
|
height2 = 500 - margin2.top - margin2.bottom; |
|
|
|
var parseDate = d3.time.format("%b %Y").parse; |
|
|
|
var x = d3.time.scale().range([0, width]), |
|
x_orig = d3.time.scale().range([0, width]), |
|
x2 = d3.time.scale().range([0, width]), |
|
y = d3.scale.linear().range([height, 0]), |
|
y2 = d3.scale.linear().range([height2, 0]); |
|
|
|
var xAxis = d3.svg.axis().scale(x).orient("bottom"), |
|
xAxis2 = d3.svg.axis().scale(x2).orient("bottom"), |
|
yAxis = d3.svg.axis().scale(y).orient("left"); |
|
|
|
var brush = d3.svg.brush() |
|
.x(x2) |
|
.on("brush", brushed); |
|
|
|
var area = d3.svg.area() |
|
.interpolate("monotone") |
|
.x(function(d) { return x(d.date); }) |
|
.y0(height) |
|
.y1(function(d) { return y(d.price); }); |
|
|
|
var area2 = d3.svg.area() |
|
.interpolate("monotone") |
|
.x(function(d) { return x2(d.date); }) |
|
.y0(height2) |
|
.y1(function(d) { return y2(d.price); }); |
|
|
|
var svg = d3.select("body").append("svg") |
|
.attr("width", width + margin.left + margin.right) |
|
.attr("height", height + margin.top + margin.bottom); |
|
|
|
svg.append("defs").append("clipPath") |
|
.attr("id", "clip") |
|
.append("rect") |
|
.attr("width", width) |
|
.attr("height", height); |
|
|
|
var focus = svg.append("g") |
|
.attr("class", "focus") |
|
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
|
|
|
var context = svg.append("g") |
|
.attr("class", "context") |
|
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")"); |
|
|
|
|
|
d3.csv("sp500.csv", type, function(error, data) { |
|
x.domain(d3.extent(data.map(function(d) { return d.date; }))); |
|
x_orig.domain(x.domain()); |
|
y.domain([0, d3.max(data.map(function(d) { return d.price; }))]); |
|
x2.domain(x.domain()); |
|
y2.domain(y.domain()); |
|
|
|
var area_clip = focus.append("g") |
|
.attr("class", "area-clip") |
|
.attr("clip-path", "url(#clip)"); |
|
|
|
var area_xform = area_clip.append("g") |
|
.attr("class", "area-transform") |
|
.attr("transform", "translate(0,0)"); |
|
|
|
area_xform.append("path") |
|
.datum(data) |
|
.attr("class", "area") |
|
.attr("d", area); |
|
|
|
focus.append("g") |
|
.attr("class", "x axis") |
|
.attr("transform", "translate(0," + height + ")") |
|
.call(xAxis); |
|
|
|
focus.append("g") |
|
.attr("class", "y axis") |
|
.call(yAxis); |
|
|
|
context.append("path") |
|
.datum(data) |
|
.attr("class", "area") |
|
.attr("d", area2); |
|
|
|
context.append("g") |
|
.attr("class", "x axis") |
|
.attr("transform", "translate(0," + height2 + ")") |
|
.call(xAxis2); |
|
|
|
context.append("g") |
|
.attr("class", "x brush") |
|
.call(brush) |
|
.selectAll("rect") |
|
.attr("y", -6) |
|
.attr("height", height2 + 7); |
|
}); |
|
|
|
function brushed() { |
|
domain = brush.empty() ? x2.domain() : brush.extent(); |
|
x.domain(domain); |
|
// new code here. Note that transformations are applied from right to left! |
|
var x_trans = -x_orig(domain[0]); |
|
var x_scale = width/(x_orig(domain[1]) - x_orig(domain[0])); |
|
focus.select(".area-transform") |
|
.attr("transform", "scale("+x_scale+",1) translate("+x_trans+",0)"); |
|
// this is computationally heavy for large datasets. |
|
//focus.select(".area").attr("d", area); |
|
focus.select(".x.axis").call(xAxis); |
|
} |
|
|
|
function type(d) { |
|
d.date = parseDate(d.date); |
|
d.price = +d.price; |
|
return d; |
|
} |
|
|
|
</script> |